if引导的条件状语从句除了主将从现还有什么原则?

Question

如题所述

Answer 1

紧跟在if后，被if引导的那个句子是从句。含有主语的句子是主句。
e.g. He will go hiking if it doesn't rain tomorrow.
从句：it doesn't rain tomorrow.
主句：He will go hiking.
e.g. 2 If I were you, I would have stopped him directly.
从句：I were you
主句：I would have stopped him directly.